N-Acetyl gemifloxacin is a metabolite of gemifloxacin. Gemifloxacin mesylate (trade name Factive, Oscient Pharmaceuticals) is an oral broad-spectrum quinolone antibacterial agent used in the treatment of acute bacterial exacerbation of chronic bronchitis and mild-to-moderate pneumonia. Oscient Pharmaceuticals has licensed the active ingredient from LG Life Sciences of Korea. (Wikipedia)

This compound belongs to the class of chemical entities known as naphthyridine carboxylic acids and derivatives. These are compounds containing a naphthyridine moiety, where one of the ring atoms bears a carboxylic acid group.